I like the Metzelers you have, and use them myself on my bikes. They won't change handling much as they wear.
What ever tire you chose, make certain the manufacturer says it fits your rim width. Oversixe tires will pinch the beads together, and create odd wear patterns. It will seem fine when new, but, wear faster than the correct size. And worse, involve progressively worse handling as the tire wears and they lose the arched crown on the tread.
Some manufacturers still offer the inch sized tires for those rims. I'd stick with those.
Cheers,